Early life Bridei must have been born no later than 628, as the death of his father
Beli of Alt Clut is recorded in the
Annales Cambriae as taking place in 627. Bridei was probably brought up within the Northumbrian court, having possibly been taken there as a hostage by the Northumbrian king
Oswiu after the killing of the Dal Riatan king
Domnall Brecc by Bridei's half-brother
Eugein of Alt Clut in 643.
Rise to power Accession of Bridei to the Pictish kingship seems to have been due at least in part to the influence of the Northumbrian kings
Oswiu and
Ecgfrith. Bridei was passed over several times for the succession to both the Pictish and Alt Clut kingships, probably as the fall of his grandfather
Edwin of Northumbria in 633 diminished political connectedness of Bridei, but the marriage of his aunt
Eanflæd to the newly crowned
King of Bernicia Oswiu in 642 would have seen him once again become well-connected to the centres of Northumbrian power. Bridei became king after the expulsion in 671 of his predecessor
Drest son of Donuel from his kingdom, which was probably centred around the northern Pictish district of
Fortriu. This event is normally connected to the "Pictish rebellion" that culminated in the
Battle of Two Rivers, suggesting Drest was leading an attempt to overthrow Northumbrian overlordship in the early years of the reign of Ecgfrith, after the death of Ecgfrith's powerful predecessor Oswiu.
Stephen of Ripon records in his
Life of St Wilfrid how the "bestial peoples of the Picts despised their subjection to the Saxons with a fierce disdain and threatened to throw off from themselves the yoke of servitude", before describing a Northumbrian victory so comprehensive it was "filling two rivers with corpses so that, amazing to say, the killers pursued the crowd of those fleeing, walking over the rivers dry foot". Stephen also records that Drest had "gathered together innumerable nations (
gentes) from every nook and corner in the north", suggesting that the Pictish forces were not otherwise politically united. The expulsion of Drest and his replacement by Bridei was probably engineered by the combined power of Ecgfrith and Pictish supporters of Bridei. Bridei would have seen himself as a subject of Ecgfrith in 671 and may have been initially subject to an overlord from a southern Pictish territory such as
Beornhaeth, a possibility supported by the description in the
Annals of Inisfallen of the later
Battle of Dun Nechtain between Bridei and Ecgfrith as "a great battle between Picts".
Expansion Bridei seems have been actively intervening in the politics of
Dál Riata in the early years of his reign. He may have been involved in the killing of
Domangart mac Domnaill the king of Dál Riata in 673, and may also have entered into a three-way alliance with his nephew
Dumnagual of Alt Clut and
Finguine Fota of the
Cenél Comgaill, king of
Cowal and the grandfather of the later king of Fortriu
Bridei son of Der-Ilei. The
Annals of Ulster record that in 676 many Picts were drowned in
Loch Awe, also suggesting an aggressive regime under Bridei attacking northern Dál Riata. In the 680s Bridei seems to have turned his attention away from Argyll, with a campaign that started less than a year after the Northumbrian king
Ecgfrith was weakened by his defeat by
Æthelred of Mercia at the
Battle of the Trent in 679. A series of conflicts recorded in Irish annals as taking place in northern Britain from 679 are likely to represent Bridei expanding his power base. The
Annals of Ulster describe a siege of
Dunnottar in 680. Bridei attacked first
Dunbeath in
Caithness and then
Orkney in 682, a campaign so violent that the
Annals of Ulster said that the
Orkney Islands were "destroyed" by Bridei ("
Orcades deletae sunt la Bruide"). With opposition removed from the north, sieges of
Dundurn in
Strathearn and
Dunadd in mid
Argyll are reported the following year. As with the earlier siege of Dunnottar, Bridei, though not explicitly named, was probably the assailant. Together Dunnottar and Dundurn mark the northern and southern limits of the southern Pictish territory south of the
Mounth, and their sieges indicate a period of sustained pressure by Bridei across the area. The pattern of high-status sites attacked in Bridei's campaigns suggests they were the centres of independent provinces that resisted his rule, as he built a confederation of territories by alliance or conquest that owed allegiance and tribute to him as king. Bridei's model of over-kingship seems closely modelled on the system of
tribute employed by the Picts' own Northumbrian over-lords.
Dun Nechtain and aftermath Bridei's threat to the southern Pictish lands represented a challenge to Northumbrian hegemony, but the immediate cause of Ecgfrith's attack on the Picts in 685 was said by
Bede to be Bridei ceasing to pay the Northumbrians
tribute, possibly in response to the Northumbrian raid in 684 against
Brega in Ireland, which was probably undertaken in response to an alliance between the Irish and the Britons. Ecgfrith sought to re-assert his dominance through a military campaign, and Bede describes how – against the advice of churchmen including
St Cuthbert – Ecgfrith "rashly led an army to lay waste the province of the Picts". Ecgfrith's incursion far into Pictish territory ended with the
Battle of Dun Nechtain on the afternoon of Saturday 20 May 685, when Ecgfrith himself was killed and his army annihilated by Bridei's after being lured by the Picts into what Bede described as "the narrow passes of inaccessible mountains". The location of the battle is uncertain: since being identified in the early 19th century by the antiquarian
George Chalmers on the basis of its placename it has generally been associated with
Dunnichen in
Angus, a location supported by the presence of a carved battle scene on one of the nearby
Aberlemno Sculptured Stones; but since 2006
Dunachton in
Badenoch has been suggested as a much better match for Bede's description, while similarly supported by the site's
toponymy. The immediate consequence of Bridei's victory at Dun Nechtain was the ending of Northumbrian overlordship over the lands of the Picts, of Dál Riata and of some British lands, though it is possible that
Fife and
Manau did not fall under the control of Fortriu until the later defeat of the Northumbrian
Berhtred by
Bridei son of Der-Ilei in 698. The Angles occupying Pictish lands either fled or were killed or enslaved, and the Anglian
Trumwine who claimed to be "Bishop of the Picts" with authority over the Pictish church from his see at
Abercorn, retired to
Whitby in Northumbria. The ending of the tributary relationship between Gaelic, British and Pictish territories and Northumbria would have caused significant political disruption across all these northern polities. Bridei's success in leading multiple Pictish provinces against an outside enemy would have served to legitimise his kingship, consolidate his extensive territorial control and promote the sense of the territories under his rule as a single cohesive community. The
power vacuum left by the Northumbrian retreat in the southern Pictish lands gave Bridei and his successors the opportunity to install favoured leaders from existing southern dynasties in positions of power and to move new groups of allies into territory abandoned by the Northumbrians. Bridei's reign saw the Dal Riatan kindred the
Cenel Comgaill rise in prominence, gaining territory in the area of modern
Clackmannanshire in the wake of Northumbrian withdrawal. The marriage of
Dargart mac Finguine of the Cenel Comgaill to
Der-Ilei, mother of the later kings of Fortriu
Bridei son of Der-Ilei and
Naiton son of Der-Ilei and probably the daughter of Bridei, saw the kindred connected directly into the Pictish Royal household. Bridei would have been at least 57 years old at the time of his victory at Dun Nechtain in 685. His death in 692 is recorded by both the
Annals of Ulster and the
Annals of Tigernach. He was buried on
Iona, and mourned by
Adomnán, the
Abbot of Iona, to whom is attributed a surviving lament for Bridei's death. == Legacy ==